Non-overlapping geometric shadow map
| Autor: | Erison Miller Santos Mesquita, Joaquim Bento Cavalcante-Neto, Creto Augusto Vidal, Rafael Fernandes Ivo |
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| Rok vydání: | 2021 |
| Předmět: |
business.industry
Computer science ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION General Engineering Data structure Computer Graphics and Computer-Aided Design Rendering (computer graphics) Human-Computer Interaction Shadow Memory footprint Preprocessor Point (geometry) Computer vision Artificial intelligence business Shadow mapping Clipping (computer graphics) ComputingMethodologies_COMPUTERGRAPHICS |
| Zdroj: | Computers & Graphics. 101:59-71 |
| ISSN: | 0097-8493 |
| DOI: | 10.1016/j.cag.2021.08.013 |
| Popis: | Real-time rendering of pixel-accurate hard shadows in 3D scenes is still a challenging problem for shadow generation techniques. In this paper, we present the concept of non-overlapping geometric shadow map (NOGSM), which enables the construction of high-quality hard shadows from static lights for any point in the scene. The NOGSM is created in a preprocessing phase, in which the scene’s geometry is looked at from the light’s point of view. All hidden surfaces are removed through total elimination of hidden polygons plus clipping of the partially hidden polygons. The resulting list of non-overlapping projected polygons is then stored in a multi-grid data structure. Our solution generates shadows with far better quality than standard shadow mapping techniques, while maintaining real time performance, and using a smaller memory footprint than compression techniques. |
| Databáze: | OpenAIRE |
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